The artist selects stones on walks through historic sites such as Berlin, Cologne, Ronchamp, Normandy Coast, and Hokkaido. He then cuts the stones and inserts the layered glass whence people look into the world existent behind the stone. Together with his credited Stone Series, he also creates Book Series on used novels, Bible among others. His stay in Dusseldorf over ten years brought him Western culture, and generated an original yet universal aesthetic which appeal to broad range of people.